10:00pm 04/05/2026 to 10:00pm 06/05/2026
You can find out more about Design Rainfall and IFD here.
Observations for this analysis :
Maximum observed rainfall by duration, estimated return period and AEP
Duration
Rainfall
Start
End
Years
AEP
10m
7.4 mm
12:50am 05/05/2026
1:00am 05/05/2026
1 in 1.2 years
84.26 %
20m
9.6 mm
12:40am 05/05/2026
1:00am 05/05/2026
1 in 1.1 years
89.65 %
30m
11.4 mm
12:40am 05/05/2026
1:10am 05/05/2026
1 in 1.1 years
89.61 %
60m
13.6 mm
12:40am 05/05/2026
1:40am 05/05/2026
1 in 1.1 years
93.12 %
90m
17.2 mm
12:40am 05/05/2026
2:10am 05/05/2026
1 in 1.1 years
87.89 %
120m
21.0 mm
12:40am 05/05/2026
2:40am 05/05/2026
1 in 1.3 years
78.15 %
3h
22.2 mm
12:20am 05/05/2026
3:20am 05/05/2026
1 in 1.2 years
85.46 %
4h
25.6 mm
10:50pm 04/05/2026
3:20am 05/05/2026
1 in 1.2 years
83.8 %
6h
25.8 mm
10:00pm 04/05/2026
4:00am 05/05/2026
1 in 1.1 years
89.63 %
9h
26.0 mm
10:00pm 04/05/2026
7:00am 05/05/2026
1 in 1.0 years
95.57 %
12h
26.0 mm
10:00pm 04/05/2026
10:00am 05/05/2026
1 in 1.0 years
97.7 %
18h
26.0 mm
10:00pm 04/05/2026
4:00pm 05/05/2026
1 in 1.0 years
98.9 %
24h
26.0 mm
10:00pm 04/05/2026
10:00pm 05/05/2026
1 in 1.0 years
99.44 %
30h
26.0 mm
10:00pm 04/05/2026
4:00am 06/05/2026
1 in 1.0 years
99.77 %
36h
25.8 mm
11:00pm 04/05/2026
11:00am 06/05/2026
1 in 1.0 years
99.84 %
48h
26.2 mm
10:00pm 04/05/2026
10:00pm 06/05/2026
1 in 1.0 years
99.9 %
Note: A '1 in 1.0 years' estimate means that it is almost certain to occur at least once in a year, and could occur much more than once per year on average. For smaller values like this the Annual Recurrance Interval (ARI) may be of more relevance, but it is complex to calculate for common events.